curl --request GET \
  --url https://api.transmit.dev/v1/contacts/lookup \
  --header 'Authorization: Bearer <token>'

{
  "id": "<string>",
  "email": "jsmith@example.com",
  "phone_number": "<string>",
  "first_name": "<string>",
  "last_name": "<string>",
  "email_subscribed": true,
  "sms_subscribed": true,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}